Global smartphone shipmentsUS craft beer production
Somewhere in the vast indifference of the universe, a smartphone leaves a factory in Shenzhen on the exact same day a brewery in Portland decides to double its IPA output, and they continue this cosmic dance together for fifteen years without ever meeting or knowing the other exists. One might reasonably expect these two phenomena to have the relationship of a brick and a cloud, yet here they are, moving together with the synchronicity of a couple who've learned to finish each other's sentences without particularly liking each other. The universe, it turns out, is less a grand design and more a filing cabinet where someone has deliberately misfiled everything.
The truth, and this is where it gets genuinely interesting, is probably much duller than cosmic conspiracy: both smartphones and craft beer rode the same economic wave between 2009 and 2023, benefiting from disposable income that grew as the world recovered from the financial crisis. A smartphone user in 2009 was a curiosity; by 2023, they were as common as the person at the dinner party who mentions they've discovered a new 'really authentic' brewery. What's actually happening is that both products appealed to the same demographic—relatively affluent people with disposable income and a taste for small, premium goods—and that demographic got steadily larger and richer, which means more phones shipped and more boutique beer got brewed, as if both industries were reading from the same economic playbook.
We are pattern-seeking creatures in a universe that contains far more patterns than sense, which is not really a problem until you start making decisions based on the ones you find. Neither smartphones nor craft beer caused the other's growth; they were both passengers on the same train, which happens to be the only thing that makes this correlation interesting rather than predictive. The real correlation is with something we can't see: money, confidence, and the collective decision that premium versions of ordinary things were worth buying. Smartphones don't make beer, and beer doesn't ship phones.
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Want to learn more about why correlations like “Global smartphone shipments” vs “US craft beer production” don't prove causation? Read our guide to statistical thinking.